JP2017095196A - Garbage collector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a garbage collector capable of efficiently compressing garbage from an initial stage when loading the garbage, while preventing interference between a garbage input box and a discharge plate.SOLUTION: A garbage collector 1 of the present invention comprises a garbage storage box 2 having an opening 4 in the rear, a garbage input box 3 tiltably arranged in the opening part 4 of the garbage storage box 2, a garbage loading device for loading garbage in the garbage storage box 2, a discharge plate 18 arranged on the inside of the garbage storage box 2 so as to freely advance-retreat by a discharge cylinder 19, a load sensor 20 for detecting a load of acting in the longitudinal direction of the garbage storage box 2 among the load of acting on the discharge plate 18, an abutting part 26 arranged on the front end of the garbage input box 3 and position control means for controlling a position of the discharge plate 18, and the position control means controls so as to enhance back pressure side hydraulic pressure of the discharge cylinder 19 until a load value detected by the load sensor 20 reaches a threshold value when the discharge plate 18 abuts on the abutting part 26 when the discharge plate 18 retreats.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a garbage truck equipped with a discharge plate.

  Conventionally, in a garbage truck, a discharge plate that can be moved back and forth via a discharge cylinder is provided in a dust storage box in which dust is stored, and when the dust is loaded into the dust storage box, the back pressure side oil chamber of the discharge cylinder is pressurized. While holding the discharge plate against the compressive force acting on the dust loaded while maintaining the pressure, if the hydraulic pressure acting on the dust loading device reaches the set value as the dust is loaded, the back pressure side of the discharge cylinder By connecting the oil chamber to the oil reservoir for a certain period of time, the discharge cylinder is contracted and the discharge plate is moved forward to expand the dust storage space. Thereby, in the conventional garbage collection vehicle, the discharge plate is moved forward stepwise and loaded while compressing the dust (for example, refer to Patent Document 1).

  Further, in the conventional garbage collection vehicle, when discharging the dust, the dust input box disposed behind the dust storage box is tilted upward to open the dust storage box, and then the discharge plate is opened from the opening of the dust storage box. Also move backward to discharge the dust. After discharging the dust, the discharge plate is moved forward, and then the dust input box is tilted downward to close the dust storage box. When moving the discharge plate forward, in order to prevent interference between the dust input box tilted downward and the discharge plate, the discharge plate is moved forward from the rearmost part in the dust storage box, An interference preventing space is provided between the opening and the discharge plate.

Japanese Patent Laid-Open No. 2-117502

  However, in the above-described garbage collection vehicle, since the space for preventing interference is provided between the opening of the dust container and the discharge plate at the initial stage when loading the dust, the dust loading device and the discharge plate It was difficult to compress the dust efficiently between the two.

  Further, in the above-described dust collecting vehicle, when the discharge plate is moved backward in order to efficiently compress the dust between the dust loading device and the discharge plate, the dust input box and the discharge plate may interfere with each other.

  Accordingly, an object of the present invention is to provide a dust collection vehicle capable of efficiently compressing dust from the initial stage when loading dust while preventing interference between the dust box and the discharge plate.

  A garbage collection vehicle according to the present invention is mounted on a chassis and has a dust storage box having an opening at the rear, a dust supply box disposed in a tiltable manner in the opening of the dust storage box, and A dust loading device that is installed inside and loads dust into the dust storage box by a hydraulic actuator, a discharge plate that is disposed inside the dust storage box by a discharge cylinder, and a load that acts on the discharge plate A load sensor that detects a load acting in the front-rear direction of the dust container, a contact portion disposed at a front end of the dust container, and a position control unit that controls the position of the discharge plate. The dust collection vehicle provided, wherein the position control means is configured to allow a load value detected by the load sensor to reach a threshold value when the discharge plate comes into contact with the contact portion when the discharge plate is retracted. Of the discharge cylinder And controlling so as to increase the hydraulic pressure of the pressure side.

  According to the dust collecting vehicle, when the discharge plate is moved backward to compress the dust efficiently, the contact portion disposed at the front end of the dust supply box before the dust input box and the discharge plate interfere with each other. Since the discharge plate abuts and the backward movement of the discharge plate is blocked by the contact portion, it is possible to prevent interference between the dust box and the discharge plate. Further, according to the dust collecting vehicle, when the discharge plate comes into contact with the contact portion when the discharge plate is retracted, the hydraulic pressure on the back pressure side of the discharge cylinder is increased until the load value detected by the load sensor reaches a threshold value. Therefore, the discharge plate can be arranged at the rearmost part in the refuse storage box. Thereby, since the volume of the space between the opening part of a dust storage box and a discharge plate can be reduced, dust can be efficiently compressed from the initial stage at the time of dust loading.

  In the garbage truck, it is preferable that at least the contact surface of the contact portion is formed of an elastic material. According to this configuration, it is possible to prevent the discharge plate from being damaged when the discharge plate contacts the contact portion.

  According to the refuse collection vehicle of the present invention, the dust can be efficiently compressed from the initial stage when the dust is loaded while preventing the interference between the dust input box and the discharge plate. Thereby, the dust loading amount of a dust storage box can be increased compared with the past, suppressing damage to a dust input box and a discharge plate.

It is a section side view showing one embodiment of the garbage truck of the present invention. FIG. 2 is a hydraulic circuit diagram of the refuse collection vehicle of FIG. 1. It is a block diagram which shows the input-output state with respect to the control apparatus of the garbage truck of FIG. It is explanatory drawing which shows the attachment position of the non-contact switch and operation switch of the refuse collection vehicle of FIG. It is a cross-sectional side view which shows the state after retracting | retreating the discharge plate in the refuse collection vehicle of FIG. It is a cross-sectional side view which shows the state after advancing the discharge plate shown in FIG. It is a cross-sectional side view which shows the state which made the discharge | emission board shown in FIG. 6 retreat and was made to contact | abut to a contact part.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described with reference to the drawings. In the following description, in the front-rear direction, the side on which dust is thrown in is described as the rear, and the opposite side is described as the front.

  FIG. 1 shows an embodiment of the garbage truck according to the present invention. The garbage collection vehicle 1 includes a dust storage box 2 mounted on a chassis, a dust input box 3 and the like disposed in an opening 4 at the rear of the dust storage box 2 so as to be tiltable about a pivot 5.

  The front surface of the dust box 3 is partially opened and communicated with the opening 4 at the rear of the dust container 2, the input port 6 is opened below the back surface, and the dust storage chamber 7 is formed at the lower part. Is formed. A dust loading device A for crushing and compressing the dust thrown into the storage chamber 7 through the inlet 6 and loading the dust into the dust storage box 2 is provided in the dust throwing box 3. Hereinafter, the refuse loading apparatus A will be described.

  Guide groove members 8 made of channel steel are laid on both side walls of the dust box 3 so as to incline from the front upper end toward the rear lower portion. In addition, an elevating plate 9 extending in the horizontal direction is accommodated in the dust box 3, and guide rollers 10 are mounted on the upper and lower sides of the elevating plate 9, and these guide rollers 10 are guided groove members 8. It is fitted so as to roll along the inner wall. On the other hand, a pivot 11 is provided on the rear upper part of the lifting plate 9 via a bracket, and this pivot 11 is provided on the side wall of the dust box 3 so as to match the sliding distance of the lifting plate 9. 8 protrudes outward from the inside of the dust box 3 beyond the notch 12 formed along the back surface. As shown also in FIG. 4, between the pivot 11 and the lower outer side of the dust box 3, the elevating cylinder 13 is displaced along the inclination direction of the guide groove member 8 and above the back surface thereof. Is provided. Thereby, the elevating plate 9 can be reciprocated up and down along the guide groove member 8 by the expansion and contraction operation of the elevating cylinder 13.

  In addition, a pushing plate 14 extending in the horizontal direction of the dust throwing box 3 is pivotally supported at the lower end of the raising / lowering plate 9 so as to be swingable back and forth, and the protruding piece 16 projecting on the back surface of the pushing plate 14 and the raising / lowering plate 9 A pushing cylinder 17 is provided between the pivot 11 provided at the upper back portion. Thereby, the pushing plate 14 can be swung back and forth around the shaft support portion 15 by the expansion and contraction operation of the pushing cylinder 17.

  The elevating cylinder 13 and the pushing cylinder 17 described above correspond to the hydraulic actuator of the dust loading device A.

  On the other hand, a discharge plate 18 that is movable back and forth in the front-rear direction is disposed inside the dust container box 2. The discharge plate 18 has a width that is substantially equal to the inner width of the dust container 2 and a height that is substantially equal to the height from the bottom wall to the top wall of the dust container 2. A discharge cylinder 19 is connected to the bracket 25 fixed to the front portion of the dust container 2. A load sensor 20 is disposed between the discharge cylinder 19 and the lower portion of the discharge plate 18. Thereby, since the discharge plate 18 and the discharge cylinder 19 are connected via the load sensor 20, the discharge plate 18 can be reciprocated back and forth within the dust container box 2 by the expansion and contraction operation of the discharge cylinder 19.

  The discharge cylinder 19 is a three-stage cylinder in which three cylinders having different diameters are incorporated. The large-diameter cylinder side is connected to the load sensor 20 and the small-diameter cylinder side is connected to the bracket 25.

  The load sensor 20 detects a longitudinal load acting on the discharge plate 18. Examples of such a load sensor 20 include a load sensor using a spring, a piezo film, a strain gauge, and the like.

  Further, a lashing cylinder 21 pivotally supported at one end is disposed at the rear rear portion of the dust container 2, and the other end is connected to a lash nail 22 pivotally supported at the lower part of the dust container 2. Yes. The lashing claw 22 is engaged with a U-bolt 23 fixed on the front surface of the dust throwing box 3, thereby securing the dust throwing box 3 to the dust container 2.

  Further, at the front end of the dust box 3, a contact portion 26 is disposed over the entire width direction of the lower edge 3 a of the opening communicating with the dust container 2. The abutting portion 26 is a portion with which the discharge plate 18 abuts. For example, a member in which a member made of a buffer material is protruded, a member in which a buffer material is attached to the surface of a metal protruding portion, or the like can be used. The buffer material is preferably an elastic material such as rubber or elastomer. When at least the contact surface 26 a of the contact portion 26 is formed of an elastic material, the discharge plate 18 can be prevented from being damaged when the discharge plate 18 contacts the contact portion 26.

  Next, the hydraulic circuit of the garbage truck 1 will be described with reference to FIG.

  This hydraulic circuit includes a hydraulic pump P, an oil reservoir T, an electromagnetic control valve V1 that controls expansion and contraction of the elevating cylinder 13, an electromagnetic control valve V2 that controls expansion and contraction of the push cylinder 17, an electromagnetic control valve V3 that controls expansion and contraction of the discharge cylinder 19, It comprises an electromagnetic control valve V4 and the like that controls expansion and contraction of the binding cylinder 21 and the tilt cylinder 24 (see FIGS. 5 to 7) that tilts the dust input box 3.

  The electromagnetic control valve V1 has solenoids SOLa and SOLb, the electromagnetic control valve V2 has solenoids SOLc and SOLd, the electromagnetic control valve V3 has solenoids SOLe and SOLf, and the electromagnetic control valve V4 has solenoids SOLh and SOLi. doing.

  Further, a hydraulic pressure sensor PS for detecting the hydraulic pressure is connected to a circuit communicating with the back pressure side oil chamber of the push cylinder 17. A release valve V and a relief valve R are connected to a circuit communicating with the back pressure side oil chamber of the discharge cylinder 19. The release valve V has a solenoid SOLg, and is normally biased to a position that prevents the back pressure side oil chamber of the discharge cylinder 19 from communicating with the oil reservoir T. When the solenoid SOLg is energized, The back pressure side oil chamber is switched to a position communicating with the oil reservoir T. The relief valve R is configured to return the pressure oil to the oil reservoir T when the hydraulic pressure in the back pressure side oil chamber of the discharge cylinder 19 reaches a set value or more. The relief valve R is activated when the load on the discharge cylinder 19 becomes excessive. Usually, as will be described later, the load value detected by the load sensor 20 and the hydraulic pressure value detected by the hydraulic sensor PS. Based on this, the discharge cylinder 19 is expanded and contracted to control the position of the discharge plate 18.

  Further, electromagnetic on-off valves V5 and V6 are provided in a circuit communicating with the back pressure side oil chamber of the tilt cylinder 24. The electromagnetic on-off valves V5 and V6 have solenoids SOLj and SOLk, respectively, and are normally urged to a position that prevents pressure oil from flowing out from the back pressure side oil chamber of the tilt cylinder 24 to the oil reservoir T. When energized to SOLj and SOLk, the pressure oil is switched to a position where it flows from the back pressure side oil chamber of the tilting cylinder 24 to the oil reservoir T.

  Next, an input / output state with respect to a control device PLC (programmable logic controller) that controls the dust loading device A, the discharge plate 18 and the like will be described with reference to FIGS.

  The driver's seat of the garbage collection vehicle 1 is provided with a selection switch SW1 for selecting a dust loading operation and a dust discharge operation, an open / close switch SW2 for the dust input box 3, a reverse switch SW3 for the discharge plate 18, and the like. 3, a start switch SW4 of the dust loading device A, a stop switch SW5 of the dust loading device A, a forward switch SW6 of the discharge plate 18 and the like are provided (see FIG. 4).

  Further, in the dust throwing box 3, a contactless switch LS1 for detecting a state in which the lift cylinder 13 for raising and lowering the lift plate 9 is fully extended, a contactless switch LS2 for detecting a state in which the lift cylinder 13 is contracted most, and a pushing plate There are provided a non-contact switch LS4 for detecting a state in which the push cylinder 17 that swings 14 is most extended, a non-contact switch LS3 for detecting a state in which the push cylinder 17 is most contracted (see FIG. 4), and the like. The non-contact switches LS1 and LS2 are switched between a dust throwing box 3 and an elevating cylinder 13 with a detection body on one side and a detection body on the other side. Further, the contactless switches LS3 and LS4 are switched between a lifting plate 9 and a pushing cylinder 17 with a detection body on one side and a detection body on the other side.

  Further, a detection body of a contactless switch LS6 for detecting a state in which the tilt cylinder 24 (see FIGS. 5 to 7) for tilting the dust input box 3 is extended to the maximum is provided above the dust input box 3 (see FIG. 4). Further, a detection body of a non-contact switch LS5 for detecting a state in which the tilt cylinder 24 is most contracted is provided at the rear part of the dust container 2 (see FIG. 4).

  For example, a photoelectric switch or a proximity switch can be used as the contactless switches LS1 to LS6.

  These various switches SW1 to SW6, contactless switches LS1 to LS6, solenoids SOLa to SOLk, hydraulic pressure sensor PS and load sensor 20 are connected to the control device PLC, and the control device PLC includes various switches SW1 to SW6, none. It is programmed to output to the corresponding solenoids SOLa to SOLk according to a procedure set in advance based on the input states of the contact switches LS1 to LS6, the hydraulic pressure sensor PS and the load sensor 20.

  Next, the operation of the garbage truck 1 configured as described above will be described.

  First, the operation of the dust loading device A will be described. The dust loading device A is normally stopped at the end of the dust loading process shown by the solid line (a) in FIG. In this state, the elevating cylinder 13 and the pushing cylinder 17 are both in the most extended state, and the contactless switches LS1 and LS4 are operated. Thereby, the raising / lowering plate 9 is arrange | positioned in the raising limit position, and the pushing board 14 is each arrange | positioned in the front swing limit position. In this state, when the operator selects the dust loading operation with the selection switch SW1 and throws the dust into the storage chamber 7 from the loading port 6 of the dust throwing box 3, the controller PLC presses the start switch SW4. Energizing the solenoid SOLd switches the electromagnetic control valve V2 to the upper position. As a result, the pushing cylinder 17 is contracted and the pushing plate 14 is reversed until the compression surface thereof is in a substantially horizontal position, as shown by a chain line (b) in FIG.

  When the pushing plate 14 reaches the backward swing limit position, that is, when the pushing cylinder 17 is contracted to the maximum, the contactless switch LS3 is activated, and the controller PLC releases the energization to the solenoid SOLd and turns on the electromagnetic control valve V2. Simultaneously with returning to the neutral position, the solenoid SOLb is energized to switch the electromagnetic control valve V1 to the upper position. Thereby, the elevating cylinder 13 is contracted, and the elevating plate 9 is lowered along the guide groove member 8. As a result, as shown in FIG. 1 chain lines (b) to (c), the pushing plate 14 connected to the elevating plate 9 descends in parallel while holding its compression surface so as to be substantially horizontal. The dust can be crushed between the arc surface of the bottom surface of the charging box 3.

  When the elevating plate 9 reaches the lower limit position, that is, when the elevating cylinder 13 contracts to the maximum, the contactless switch LS2 is activated, and the control device PLC releases the energization to the solenoid SOLb and brings the electromagnetic control valve V1 to the neutral position. Simultaneously, the solenoid SOLc is energized to switch the electromagnetic control valve V2 to the lower position. As a result, the pushing cylinder 17 extends from the dust crushing end state shown in FIG. 1 chain line (c), and as shown in FIG. 1 chain line (d), the pushing plate 14 is used as its compression surface with the shaft support portion 15 as a fulcrum. Swing clockwise until is nearly vertical. As a result, the pushing plate 14 can secondarily compress the dust primarily crushed in the previous stroke with the flat surface of the bottom surface of the dust box 3.

  When the push plate 14 reaches the forward swing limit position, that is, when the push cylinder 17 is extended to the maximum, the contactless switch LS4 is activated, and the controller PLC releases the energization to the solenoid SOLc and turns off the electromagnetic control valve V2. Simultaneously with returning to the neutral position, the solenoid SOLa is energized to switch the electromagnetic control valve V1 to the lower position. As a result, the lifting and lowering cylinder 13 is extended from the end of the compression stroke shown in FIG. 1 (d), and the pushing plate 14 is lifted in parallel with the compression surface thereof being substantially vertical so that the previous stroke is reached. The compressed dust is loaded into the dust container 2. When the elevating plate 9 reaches the ascent limit position, that is, when the elevating cylinder 13 is extended to the maximum, the contactless switch LS1 is activated, and the control device PLC releases the energization of the solenoid SOLa and turns on the electromagnetic control valve V1. Return to the neutral position. This completes the loading process.

  As described above, the dust loading device A operates in the order of the reverse stroke, the crushing stroke, the compression stroke, and the loading stroke (hereinafter also referred to as “loading cycle”) by pressing the start switch SW4. The dust thrown into the charging box 3 can be loaded into the dust storage box 2.

  In the crushing process from the inversion end state shown in FIG. 1 chain line (b) to the chain line (c) in FIG. 1, the control device PLC starts when the lifting plate 9 starts to descend and the set time elapses. It is also possible to stop the lowering of 9 and shift to the compression stroke by the pushing plate 14. That is, even if the raising / lowering plate 9 is prevented from descending by dust and the raising / lowering cylinder 13 does not reach the contraction side stroke end, the control device PLC can also shift to the next compression stroke if a certain time has elapsed.

  Further, in the compression stroke, the control device PLC stops the compression stroke by the pushing plate 14 when the pushing plate 14 starts swinging forward and the set time elapses, and performs the loading stroke by the raising of the lifting plate 9. It can also be migrated. That is, even if the compression by the pushing plate 14 is prevented by the dust and the pushing cylinder 17 has not reached the extension side stroke end, the control device PLC can also shift to the next loading stroke after a certain period of time. .

  By the way, in the above-described dust loading process, the electromagnetic control valve V3 for controlling expansion / contraction of the discharge cylinder 19 is normally in a neutral position, and the piston cylinder side oil chamber and the piston back pressure side are in a state where the discharge cylinder 19 is extended. The oil chamber is port-blocked. As a result, when the dust is loaded into the dust container 2, the discharge cylinder 19 is held in an extended state, so that the dust is compressed between the pushing plate 14 and the discharge plate 18.

  By sequentially loading the dust into the dust container 2 by the dust loading device A, the reaction force of the dust acting on the pushing plate 14 also increases. In this case, the hydraulic pressure in the back pressure side oil chamber of the pushing cylinder 17 that supports the pushing plate 14 gradually increases. When the oil pressure value detected by the oil pressure sensor PS, that is, the oil pressure value of the back pressure side oil chamber of the pushing cylinder 17 becomes equal to or greater than a predetermined value, the control device PLC energizes the solenoid SOLg for a predetermined time, for example, 1 second, Release the release valve V. While the release valve V is opened, the pressure oil is recirculated from the back pressure side oil chamber of the discharge cylinder 19 to the oil reservoir T. At this time, the discharge cylinder 19 contracts due to the reaction force of the compressed dust, and the discharge plate 18 moves forward. As a result, since a new dust storage space is formed in the dust storage box 2, dust can be loaded into the new dust storage space while being compressed.

  Next, the operation of the garbage truck 1 when discharging the dust will be described mainly with reference to FIGS. 2 and 5 to 7. FIG. 5 is a cross-sectional side view showing a state after the discharge plate 18 is retracted in the garbage truck 1 shown in FIG. 6 is a cross-sectional side view showing a state after the discharge plate 18 shown in FIG. 5 is advanced. FIG. 7 is a cross-sectional side view showing a state where the discharge plate 18 shown in FIG.

  First, the operator selects the dust discharge operation by the selection switch SW1, and operates the open / close switch SW2 to the “open” position. As a result, the controller PLC energizes the solenoid SOLh and switches the electromagnetic control valve V4 to the lower position. As a result, the lashing cylinder 21 is extended, and the lashing claw 22 is rotated clockwise to be detached from the U-bolt 23, whereby the trashing of the dust container 3 with respect to the dust container 2 is released. When the lashing cylinder 21 is extended to the maximum, pressure oil is supplied from the pipe line communicating with the lashing cylinder 21 to the back pressure side oil chamber of the tilt cylinder 24 via the electromagnetic on-off valves V5 and V6. As a result, the tilting cylinder 24 is extended, and the dust container 3 is opened with the dust container 3 being tilted upward with respect to the dust container 2 about the pivot 5 (see FIG. 5). When the dust box 3 reaches the upper limit position, that is, when the tilting cylinder 24 is extended to the maximum, the non-contact switch LS6 is activated, and the controller PLC releases the energization to the solenoid SOLh and the electromagnetic control valve V4. Return to the neutral position.

  Next, when the operator presses the reverse switch SW3, the control device PLC energizes the solenoid SOLf and switches the electromagnetic control valve V3 to the lower position. As a result, when the discharge cylinder 19 is extended, the discharge plate 18 is retracted, and dust (not shown) behind the discharge plate 18 is discharged from the dust storage box 2. Then, as shown in FIG. 5, when the discharge plate 18 moves rearward from the opening 4 of the dust container 2 and reaches the rear limit position, that is, when the discharge cylinder 19 is fully extended, the control device PLC The energization to SOLf is canceled and the electromagnetic control valve V3 is returned to the neutral position.

  Next, when the operator presses the forward switch SW6, the control device PLC energizes the solenoid SOLe and switches the electromagnetic control valve V3 to the upper position. As a result, the discharge cylinder 19 is contracted to advance the discharge plate 18. Then, after a predetermined time (for example, 1 second) elapses and the discharge plate 18 reaches the front of the opening 4 of the dust container box 2 as shown in FIG. 6, the control device PLC energizes the solenoid SOLe. Release and return the electromagnetic control valve V3 to the neutral position.

  Next, when the operator operates the open / close switch SW2 to the “closed” position, the controller PLC energizes the solenoids SOLj and SOLk, and switches the electromagnetic open / close valves V5 and V6 to the upper position. As a result, the pressure oil is recirculated from the back pressure side oil chamber of the tilting cylinder 24 to the oil reservoir T, so that the tilting cylinder 24 is contracted by the dead weight of the dust throwing box 3, and the dust throwing box 3 is moved with respect to the dust storage box 2. By tilting downward about the pivot 5, the dust container 2 is closed (see FIG. 6). When the dust box 3 reaches the lower limit position, that is, when the tilting cylinder 24 contracts to the maximum, the non-contact switch LS5 is activated, and the controller PLC releases the energization to the solenoids SOLj and SOLk and opens and closes electromagnetically. The valves V5 and V6 are returned to their original positions, and the solenoid SOLi is energized to switch the electromagnetic control valve V4 to the upper position. As a result, the lashing cylinder 21 is contracted, and the lashing claw 22 is rotated counterclockwise and engaged with the U-bolt 23, whereby the dust throwing box 3 is locked to the dust container 2. . When the lashing cylinder 21 contracts to the maximum, the control device PLC releases the energization to the solenoid SOLi and returns the electromagnetic control valve V4 to the neutral position.

  Next, the control device PLC energizes the solenoid SOLf and switches the electromagnetic control valve V3 to the lower position. As a result, the discharge cylinder 19 moves backward by the discharge cylinder 19 extending. The energization of the solenoid SOLf is continued until the lower portion of the discharge plate 18 comes into contact with the contact portion 26 and the load value detected by the load sensor 20 reaches a threshold value as shown in FIG. As a result, the hydraulic pressure on the back pressure side of the discharge cylinder 19 is increased. When the load value reaches the threshold value, the controller PLC releases the power supply to the solenoid SOLf and returns the electromagnetic control valve V3 to the neutral position. Thereby, the discharge plate 18 can be arranged at the rearmost part in the refuse storage box 2. As a result, since the volume of the space between the opening 4 of the dust container 2 and the discharge plate 18 can be reduced, the dust can be efficiently compressed from the initial stage in the dust loading process described above. In this case, the control device PLC functions as a position control means for controlling the position of the discharge plate 18 so that dust can be efficiently compressed.

  In a conventional garbage truck, when the discharge plate is moved backward to compress the dust efficiently between the dust loading device and the discharge plate, the dust input box and the discharge plate interfere with each other, and the dust input box and the discharge plate There was a risk of damage. On the other hand, according to the dust collecting vehicle 1 described above, when the discharge plate 18 is moved backward, the contact portion disposed at the front end of the dust input box 3 before the dust input box 3 and the discharge plate 18 interfere with each other. 26, the discharge plate 18 abuts, and the retreat of the discharge plate 18 is prevented by the abutment portion 26, so that interference between the dust box 3 and the discharge plate 18 can be prevented. Thereby, damage to the dust input box 3 and the discharge plate 18 can be prevented. Further, according to the dust collecting vehicle 1 described above, when the discharge plate 18 contacts the contact portion 26 when the discharge plate 18 moves backward, the discharge cylinder 19 is maintained until the load value detected by the load sensor 20 reaches a threshold value. Therefore, the discharge plate 18 can be disposed at the rearmost part in the dust container box 2 in order to control so as to increase the hydraulic pressure on the back pressure side. Thereby, since the volume of the space between the opening part 4 of the refuse storage box 2 and the discharge plate 18 can be reduced, dust can be efficiently compressed from the initial stage at the time of dust loading. As a result, the amount of dust loaded in the dust container 2 can be increased as compared with the conventional case.

  The preferred embodiments of the present invention have been described above, but only specific examples are illustrated, and the present invention is not particularly limited, and the specific configuration and the like can be appropriately changed in design.

  For example, in the above embodiment, the contact portion is disposed over the entire width direction of the lower edge at the front end of the dust input box, but the contact portion can prevent interference between the dust input box and the discharge plate. As long as it is the position, it may be disposed at any position such as the upper part of the front end of the dust box. Further, the number, material, shape, size, and the like of the contact portion are not limited.

  In the above embodiment, the discharge plate and the contact portion are brought into contact immediately after the dust input box is secured to the dust storage box. For example, the discharge plate and the contact portion immediately before the loading cycle is started. May be brought into contact with each other.

  Moreover, in the said embodiment, although the principal part of the dust loading apparatus was comprised with the raising / lowering board and the pushing board, the principal part can also be comprised with a rotation board and a pushing board, and the structure is not specifically limited.

DESCRIPTION OF SYMBOLS 1 Dust collection truck 2 Dust storage box 3 Dust input box 9 Lift plate 13 Lift cylinder (hydraulic actuator)
14 Pushing plate 17 Pushing cylinder (hydraulic actuator)
18 Discharge Plate 19 Discharge Cylinder 20 Load Sensor 21 Tightening Cylinder 24 Tilt Cylinder 26 Contact Part A Dust Loading Device PLC Control Device (Position Control Means)

Claims (2)

A garbage storage box mounted on the chassis and having an opening at the back;
A dust input box disposed to be freely tiltable at an opening of the dust storage box;
A dust loading device mounted inside the dust throwing box, and loading dust into the dust containing box by a hydraulic actuator;
A discharge plate disposed in the dust container box so as to be movable forward and backward by a discharge cylinder;
Among the loads acting on the discharge plate, a load sensor that detects a load acting in the front-rear direction of the dust storage box,
A contact portion disposed at a front end of the dust box,
A garbage collection vehicle comprising position control means for controlling the position of the discharge plate,
When the discharge plate comes into contact with the contact portion when the discharge plate is retracted, the position control means controls the hydraulic pressure on the back pressure side of the discharge cylinder until the load value detected by the load sensor reaches a threshold value. A garbage truck that is controlled to increase.   The garbage truck according to claim 1, wherein at least a contact surface of the contact portion is formed of an elastic material.

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